On the Difference Between Orthodoxy and Heterodoxy

Orthodoxy differs from heterodoxy (the non-Orthodox) in a small way, but this small matter is the greatest thing. Orthodoxy gives you rest. A heresy is an easy answer, but it is one that actually tortures you because it ignores man. The way of Orthodoxy is filled with difficulties and crosses, but it leads you to the path wherein you glorify God for all things and are thankful for all things— the Resurrection. (The Thunder-Bolt of Ever-Living Fire: American Conversations with an Athonite Elder [kindle version])